This is fascinating. In ...

This is fascinating. In Australia a lot of our local Authorities add flouride to our drinking water, in the belief that it prevents tooth decay.

In fact it was mandatary for a while. But a change of Government has now made it optional. But our local Water Supply authority is still adding it.

So it is up to the home owner to remove it if they wish. So far the only practical solution for this is RO, with the resultant huge waste of water. which seems to be counter productive, given the fact that water saving devices are mandatory, and water restrictions are usually in force.